/Engine/Source/Developer/TreeMap/Public/ITreeMap.h
Parses an OPML XML document and converts the outliner content to tree map node data
The root tree node for the parsed data, or an invalid pointer if something went wrong
static FTreeMapNodeDataPtr ParseOPMLToTreeMapData ( const [FString](API\Runtime\Core\Containers\FString) & OPMLFilePath, [FString](API\Runtime\Core\Containers\FString) & OutErrorMessage )